It seems like there’s always a hot new library or framework promising great things. But people often forget about the pain and effort required to move from an old technology to a new one. How long will it take? If you finish, will it be worth it? And if you don’t, could it leave you in a worse place than where you started?
Drawing from my experience of the Typescript migration we recently completed at Monzo I’ll take you through some of the different outcomes of technical migrations and the things we learned along the way, and leave you with a toolkit to tackle your next migration project.
Interview:
What is the focus of your work?
I’m primarily focussed on customer operations, building internal tooling to manage service and demand. I’m also the Discipline Lead for web, which means making sure we’re heading in the right direction and helping to establish a vision for where we want to be.
What’s the motivation for your talk?
I know that migrations are an inevitable part of working in software, and I wanted to share our lessons learned so that they might help others in the same position. I’m also proud of what we achieved as a team, even if it wasn’t super smooth sailing all the way through.
Who is your talk for?
This talk is for anyone who needs to effect change in the organisation - it’s not just a technical talk, it’s all about stakeholder management and navigating change. Even introducing a new piece of software or a new team process can require a level of buy-in and preparation that you might not have expected.
What do you want someone to walk away with from your presentation?
I hope this talk provides people with a toolkit to use when they approach their next migration, so that they can make it as low-risk and low-friction as possible.
Speaker

Sophie Koonin
Web Engineering Lead @Monzo, Writer, Speaker and Web 1.0 Enthusiast
Sophie is a staff engineer & web engineering lead at Monzo Bank, responsible for the web platform across the organisation and working on internal tooling that powers Monzo’s award-winning customer service. Building websites since the age of 10, she’s passionate about creating inclusive, accessible and fun websites that people love. Sophie writes about tech & mental health at localghost.dev, builds intentionally useless web apps, and co-runs a pop choir in London.